1package packet
 2
 3import (
 4	"io"
 5)
 6
 7// Padding type represents a Padding Packet (Tag 21).
 8// The padding type is represented by the length of its padding.
 9// see https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh#name-padding-packet-tag-21
10type Padding int
11
12// parse just ignores the padding content.
13func (pad Padding) parse(reader io.Reader) error {
14	_, err := io.CopyN(io.Discard, reader, int64(pad))
15	return err
16}
17
18// SerializePadding writes the padding to writer.
19func (pad Padding) SerializePadding(writer io.Writer, rand io.Reader) error {
20	err := serializeHeader(writer, packetPadding, int(pad))
21	if err != nil {
22		return err
23	}
24	_, err = io.CopyN(writer, rand, int64(pad))
25	return err
26}